1. The Marketplace is filled with content created by the community, dwarfing the amount of legacy first-party content. Ditching this model for a "season pass" strategy hurts community creators, taking revenue away from them and putting it entirely in Mojang's pockets. Besides, it's not like the Marketplace is the only place to get new Bedrock content. The game natively supports custom skins, packs, and world imports.
2. While they won't be selling new copies of the legacy console editions, players who already own it can still play it whenever (and, I believe, reinstall whenever). I feel like their best bet is to re-release the minigames from legacy editions, though in time servers and community-created maps will likely reproduce them anyway.
3. Legacy console editions had fewer cheats for the same reason macOS has fewer viruses - it's a very closed platform. Because this edition is cross-platform, console players can often run into PC and mobile users running cheats. While Windows has something built-in to combat this (called TruePlay), Mojang hasn't implemented it to proceed with their hands-off approach to dealing with cheaters. The community has been handling them for 8 years now - no reason to change what already works well.
4. I mostly agree with your points here. The new UI is pretty good, but crafting on legacy console was a lot more organized in my opinion.
5. The game runs pretty darn well in its current state. It runs like butter even on less powerful devices, and has very high scalability for powerful desktop PC's. The upcoming graphics engine rework will optimize performance even more, paving the way for the Super Duper Graphics Pack. With the exception of initial startup, loading times are faster across the board compared to Java, and on par with legacy console. The menu system used to be slow, but as of a few updates ago it's been very snappy. While the new menu animations could use some work (30 or 60 FPS lock on the animation is a poor choice), but overall it's as responsive as legacy versions. As for the textures, I agree some of them are outdated, but I think they're holding out for the complete texture rework to make any changes.
